A255035 Number of (n+2)X(7+2) 0..1 arrays with every 3X3 subblock sum of the two sums of the central row and central column minus the two minimums of the diagonal and antidiagonal nondecreasing horizontally, vertically and ne-to-sw antidiagonally

1640073, 3504157, 2396285, 1231466, 1001108, 819368, 813888, 838084, 885048, 936028, 984184, 1031452, 1122944, 1218980, 1306424, 1372324, 1628120, 1916524, 2137632, 2299556, 3178784, 4225732, 4993640, 5516172, 8910624, 12957964

Offset

1,1

Comments

Column 7 of A255036

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Formula

Empirical: a(n) = a(n-1) +a(n-2) -a(n-3) +4*a(n-4) -3*a(n-5) -5*a(n-6) +3*a(n-7) +a(n-8) -4*a(n-9) +4*a(n-10) +4*a(n-11) -4*a(n-12) for n>20

Example

Some solutions for n=1
..0..0..1..0..1..0..1..1..1....0..0..0..0..0..1..1..1..0
..1..0..0..1..0..0..1..0..1....0..0..0..1..1..0..1..1..1
..0..0..0..0..0..1..0..0..0....1..1..0..0..0..0..1..1..1

Crossrefs

Cf. A255036

Sequence in context: A015377 A296450 A255042 * A256953 A205985 A258953

Adjacent sequences: A255032 A255033 A255034 * A255036 A255037 A255038

Keyword

nonn

Author

R. H. Hardin, Feb 13 2015

Status

approved